I emerge KDE 3.0.1 at the moment. The md5 patching of kdemultimedia is no longer needed. It is fixed. But i got a message after emerging kdemultimedia, which said alsa was disabled because of a bug in this package. You should use the oss-emulation instead.
I'll report as soon as i can say more about it.

I use alsa with KDE 3.0.1. kdemultimedia gave me an error but was installed properly. I haven't noticed any problems so far.

mellofone: I don't had that many deps. I had most of the non-kde-packages already installed.
What version of QT are you running ? QT3.0.3 should work as well. I know QT really takes a lot of time to compile.

i just upgraded to 3.0.1 and besides the alsa bug error msg it went smooth, just emerge -u world again and vola. 3 1/2 hours to run in total and by the first look everything works, just got some extra/double menuentries but thats fixed... sound works..._________________Using Gentoo since 2002.